Frostbound love

Thranduil Elven king of Mirkwood finds a trespassor in his kingdom. Has an ancient and deadly race of creatures finally come our of hiding? Who or what has dared entered his domain? What happens when he meets someone who doesnt fear him? Can this shapeshifter stay a step ahead of such an old and powerful elf? Can she and her people finally step out of the shadows? Can Thranduil learn that to respect such a worthy adversary? (M for later chapters)